Simulation of deep-sea reservoir development monitoring using marine controlled-source electromagnetic method
LIU Yong1, LI Wenbin1, DENG Fangshun1, CHEN Hangyu2, DING Xuezhen2, LIU Ying2,3
1. Laboratory of Low Frequency Electromagnetic Communication Technology with the 722 Research Institute, CSSC, Wuhan, Hubei 430079, China; 2. College of Marine Geosciences, Ocean University of China, Qingdao, Shandong 266100, China; 3. Key Lab of Submarine Geosciences and Prospecting Techniques of Ministry of Education, Qing-dao, Shandong 266100, China
Abstract：The marine controlled-source electromagnetic (MCSEM) method has application values in monitoring the development process of reservoirs. On the basis of two-dimensional (2D) marine geoelectric models, we use a 2D forward modeling algorithm of marine controlled sources to calculate the electromagnetic response of different geoelectric models. Simulation analysis is carried out for the influencing factors of reservoir development monitoring by MCSEM under different environment and working modes. In addition, we compare three different observation methods, namely, emitting and receiving at the sea botttom, emitting at the sea bottom and receiving in the well, and emitting and receiving in the well. The results show that the emission frequency, reservoir thickness, burial depth of the reservoir, and depth of seawater all affect the monitoring effect. The observation method that places the receivers in the well has better performance in reservoir development monitoring, which can highlight the electromagnetic response sourced from the high-resistivity reservoir.
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